Batch aerobic treatment of a pharmaceutical wastewater. (Water Quality and Treatment 02:00 PM, Saturday, April 5, 2003 Brewer/Frost Science 138 Dr. Yung-Tse Hung-Presiding).

Hung, Yung-Tse ; Suvarnakanti, Ravi Chand ; Yeh, Ruth Yu-Li 等

2:45

This objective of the study was to determine the effect of temperature on the treatment efficiency of COD (chemical oxygen demand) from pharmaceutical wastewater by batch activated sludge reactors and a two stage activated sludge reactors Batch activated sludge reactors were operated at various temperatures from 30 to 70 UC. Soluble COD removal efficiency decreased from 62% to 38% as temperature increased from 30 UC to 60 UC. When temperature was higher than 60UC the aerobic biological treatment was not effective. For the two-stage biological treatment process better soluble COD removal was achieved when both reactors were operated at 30 0C compared to the 2 stage treatment system where the temperature was maintained at 55 UC and 30 UC for the first and second stage, respectively. The first 2-stage system (30 0C and 30 UC) reduced COD from 2800 to 1450 mg/L, while the second 2-stage system (55 UC and 30 UC) reduced COD from 3650 to 1900 mg/L. The results indicated the maximum temperature for pharmaceutical wastewater treatment was from about 60-65 UC. A two stage aerobic treatment system produced a good quality of effluent when both reactors were operated at 30 UC compared to a system where the 2 stage reactors were consecutively operated at 55 and 30 UC, respectively.

YUNG-TSE HUNG Y.HUNG@CSUOHIO.EDU AND RAVI CHAND SUVARNAKANTI RAVISUVARNAKANTI@YAHOO.COM, CIVIL AND ENVIRONMENTAL ENGINEERING DEPT, CLEVELAND STATE UNIVERSITY, CLEVELAND OH44115-2214, RUTH YU-LI YEH, CHEMICAL ENGINEERING DEPT, MING-HSIN UNIVERSITY OF SCIENCE AND TECHNOLOGY, HSINCHU, TAIWAN